[1] Univ Michigan, Ctr Human Growth & Dev, Ann Arbor, MI 48109 USA
[2] Ashkelon Acad Coll, Dept Psychol, IL-78109 Ashqelon, Israel
[3] Zhejiang Univ, Sch Med, Dept Child Hlth Care, Childrens Hosp, Hangzhou 310003, Zhejiang, Peoples R China
[4] Peking Univ, Dept Pediat, Hosp 1, Beijing 100034, Peoples R China
[5] Peking Univ, Womens & Childrens Hlth Ctr, Beijing 100034, Peoples R China
[6] Peking Univ, Dept Clin Lab, Hosp 1, Beijing 100034, Peoples R China
[7] Univ Michigan, Dept Psychol, Ann Arbor, MI 48109 USA
[8] Univ Michigan, Dept Pediat & Communicable Dis, Ann Arbor, MI 48109 USA